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Chapter 154 Drops of liquid

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    "This is the main control panel. These boxes are used to select detection objects. As you can tell from the name, they include pre-activation self-test, charging, power-on refining, and thermal shutdown modules. The vacuum generator was just enabled  In front of the slag remelting furnace, we selected the self-test module and entered the self-test monitoring screen. Through the precision detection instruments installed in the furnace body, we observed the extraction vacuum status, whether each travel switch is normal, the offset angle, and the reciprocating motion of each moving part.  Self-test and other key data are used to assist the operator in checking the status of the vacuum electroslag remelting furnace. This process is fully automated. The relevant data is solidified in the control chip, and the corresponding data will be returned for each item tested and compared with the data in the chip.  Compare and confirm that it is within the allowable error, and the words 'test passed' will be displayed. If all the data is passed, the equipment can be activated, otherwise it will automatically lock to avoid damage to the equipment" The vacuum electroslag refining workshop is very spacey.  The large, automated main control room is located in the left corner of the factory building, with an area of ??more than 20 square meters.  At this time, the main control room was crowded with people wearing white coats, basically all experts from China.  As the owners, the teachers from the military district colleges will have enough time to visit and study in the future, so they did not enter the main control room and occupy the already crowded space.  In order to accommodate as many people as possible, the experts proposed that except for the operators, there is no need to put chairs for them, they can just stand.  Most of these experts wear thick myopic glasses and white coats. Each of them holds a small book. Even the old experts with white hair are like primary school students listening to the teacher's lectures, while listening to Guan Fei.  Explain in detail while taking notes with a serious expression.  Many people also drew down the content displayed on the main control screen stroke by stroke as a reference.  Although there are many people, the room is orderly.  Everyone was silent, even their coughs were suppressed, for fear of affecting others.  People who have questions about a certain place will also raise their hands first, and only ask questions after getting permission.  After the entire installation project was completed the day before yesterday, a pre-heat test inspection was conducted.  Precision components such as beams, columns, rollers, guide rails; travel limit switches; x-axis and y-axis control mechanisms; crystallizer linkage components, gearboxes, reducers, brakes; equipment weight sensors, temperature sensors, potential sensors and other links, and finally  Did a comprehensive inspection.  Today will be the day for the official heating and trial operation of the vacuum electroslag remelting furnace. Not only the earlier expert team, but also the inspection team led by the Chinese Academy of Sciences also set out collectively.  Because there were so many people, even the spacious workshop could not accommodate them, and most people could only wait outside the factory.  The first test flight, Guan Fei attached great importance to it.  No one in China has ever actually operated a vacuum electroslag resmelting furnace. No one knows what will happen, let alone how to deal with it.  So today, in addition to several operators from the special alloy factory, he also went into battle himself.  Under his clear and concise instructions, several operators faced their respective control screens and operated calmly, successfully completing all tasks including pre-activation self-inspection, electrode installation and testing, and loading.  At this time, we can see how highly automated the vacuum electroslag remelting furnace has been after Guan Fei's modification.  With the help of a large number of sensors, various data are summarized and transmitted to the main console, and displayed in front of everyone at a glance.  There is no need for a large number of technical personnel to rush around to carry out various inspections before use.  The operator only needs to select the corresponding cursor on the keyboard, press the button, and all the work is handed over to the main control chip, and then just wait for the data quietly.  Although the operators are somewhat afraid of making mistakes, even though the equipment self-inspection has passed, they still have to refer to the operation manual for repeated comparisons, which wastes a lot of time.  But even so, the whole process didn¡¯t take more than ten minutes!  "It's too fast!" "Yeah, we used to have dozens of people and half a day just to enable the pre-self-check. But now it's just two or three people, pressing a few buttons on the computer on the main console.  Just press a button and everything is done, it¡¯s so convenient! ¡°It¡¯s just a bit expensive. Their remelting furnace has a lot of sensors. Originally, the advantages of the electroslag remelting furnace are that it has simple equipment and low requirements on the site.  , The cost is low. But they first added a vacuum seal and installed so many sensors, and the cost doubled at once. This is too uneconomical! " "It can't be said that the one-time investment is huge.  Point, but you have also seen that with the improvement of automation, the labor intensity of technicians has also been reduced, and the preparation time before use has also been shortened. From a cost-effectiveness perspective, it is difficult to say that it is a waste" Seeing the vacuum after modification.  The operating efficiency of the electroslag resmelting furnace was so high that the experts who were watching finally couldn't hold it back anymore and started buzzing low.There was a lot of discussion.  "All parameters are correct and can be powered on!" On the console on the right, a technician had slight beads of sweat on his forehead, and there were water stains on the places where his palms touched. He was obviously so nervous that his palms were sweaty. He raised his head and lowered his head.  , read the operation manual countless times, checked all the parameters, and finally spoke in a tone that was half asking for instructions and half affirming, and raised his head to look at Guan Fei.  "Don't be nervous. Are you sure the parameters are correct?" Guan Fei stood next to him and said calmly.  The technician became even more nervous when he asked him this question. He thought he had made a mistake and quickly compared the numbers one by one: "There is indeed no problem." "Then what does the process say?" Guan Fei still said  He asked instead without giving an accurate answer.  "The process says that it's time to turn on the power and start refining" the technician stammered, his voice a little weak, showing that he was still not confident.  The experts who were watching gave a burst of good-natured chuckles.  They all saw the nervousness of this young man. It¡¯s no wonder, facing a piece of equipment worth millions, who can stay calm before operating it for the first time.  What¡¯s more, in the eyes of veteran experts, he is still a child!  Guan Fei did not smile, but bent slightly, supporting the console with his left hand and putting his right hand on his shoulder, encouraging him softly: "Since all the processes and parameters are in accordance with the manual, just follow them. You are the operator  People, the operation of the entire equipment is controlled by you, so when it¡¯s time to be decisive, be decisive. You didn¡¯t write the manual. Even if something goes wrong, as long as your operation process is fine, it has nothing to do with you. Do you understand?  ?¡± ¡°Yes!¡± The technician¡¯s heart was still pounding, but he was no longer so scared, and he responded loudly.  "So according to the process, what should we do next?" Guan Fei repeated the question again.  "Power on!" He said, the technician gritted his teeth, and bravely pressed the power on button under the gaze of a group of experts behind him who held their breath. ? ? ? ? ? ? ? ? ? ? ? When he pressed the button, everyone's eyes quickly turned and looked up at the 29-inch large screen above the console.  The screen was originally dark and nothing could be seen.  As the current was turned on, it suddenly showed a dark red light.  After a second or two, the red light became stronger and stronger, more and more dazzling, and finally turned into a bright white, making it impossible to see the picture above at all. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? A burst of warm applause suddenly erupted in the quiet main control room.  Electrical heating successful!  Science is like this. It ends with solving one problem after another and ultimately ensuring the normal operation of the equipment.  Even if today's test machine failed, as far as the electric heating project is concerned, results have been achieved, proving the reliability of this component.  It doesn¡¯t matter if you fail, just find the cause of the failure and solve it step by step.  ¡°At least, for now, the first hurdle has been passed and phased results have been achieved. All the experts couldn¡¯t help but applaud, and the control room was filled with joy.  "The vacuum electroslag resmelting furnace has failed several times in China. This is the first time it has succeeded - even if it is a partial success, everyone can't help but get excited.  This at least proves that it is not that vacuum electroslag resmelting furnaces cannot be built in China, but that the previous direction was wrong.  ¡°Can¡¯t do it and can¡¯t do it, these are two concepts.  If you can¡¯t do it, then you really can¡¯t do it. No matter what you think of, all your efforts are in vain.  But if you do it wrong, it just means that everyone has not found a solution. After improving your ideas and research directions, you may succeed.  Seeing that the first vacuum electroslag remelting furnace designed by the military division and manufactured in China was successfully energized to melt steel, although it was still far from the final success, everyone was already laughing to the sky with excitement and couldn't help themselves.  Where there is the first one, there will be the second and third one This is the key step to create something from scratch!  From now on, the country has finally seen the dawn of breaking through the blockade of Western forces and possessing our own independently produced vacuum electroslag resmelting furnace. Many people could not help but burst into tears.  "It's dripping! It's dripping!" A sharp-eyed old expert suddenly pointed at another monitor screen next to him, screaming and jumping like a child.  Boom!  There was chaos in the main control room, and everyone wanted to squeeze to the front to watch.  "It's really dripping!" Someone didn't know who screamed in a cry-like tone.  ¡°It¡¯s dripping!¡± ¡°Yes, it¡¯s dripping!¡± ¡­ ¡°It¡¯s dripping!¡±The sound was heard from front to back, from the main control room to the workshop, and from the workshop to outside the factory. Everyone was repeating one word, "It's dripping!"  Although only a handful of people saw the surveillance screen, and most of them only got the news from others, this did not prevent them from smiling like flowers and passing on the good news to others.  Hundreds of people, but they all kept repeating with the same voice: "It's dripping!" Many people were talking and laughing, with tears streaming down their cheeks.  They finally look forward to the day when all their hardships will be over.  Because it¡¯s dripping!  The vacuum electroslag remelting furnace is an upgraded version of the electroslag remelting furnace. It is an out-of-furnace refining technology that originated in the 1960s, developed in the 1980s, and matured in the late 1980s and early 1990s.  The so-called electroslag remelting furnace, simply put, is to contact the self-consumable electrode with the molten slag, and then generate high heat after being energized to melt the steel material.  When the melted molten steel penetrates through the slag layer, it comes into close contact with the slag material, thereby removing non-metallic impurities in the molten steel. At the same time, during the steel-slag reaction process, harmful impurities such as sulfur, lead, and tin that are difficult to treat are removed.  The purity of steel ingots that have been remelted by electroslag is very high.  And the molten steel penetrates from the slag material, drips into the water-cooled mold, gradually solidifies at the bottom, and evenly expands to the surroundings, avoiding the disadvantages of poor center growth that inevitably occurs in traditional melt forging, and the metallographic structure is uniform and dense.  As the steel ingot gradually grows, a thin layer of slag will appear between the steel ingot and the mold wall, making the surface of the steel ingot very smooth.  These characteristics make the special alloys refined by electroslag remelting technology excellent in quality and very suitable for refining special alloy materials such as alloy structural steels, bearing steels, tool steels, ultra-high strength steels, precision alloys, and corrosion-resistant alloys.  The impact resistance and wear resistance are doubled, which is of immeasurable value for improving national defense, aerospace, and precision manufacturing technology.  This vacuum electroslag remelting furnace in the military division is another major improvement based on the ordinary electroslag remelting furnace.  Although it only adds a double-layer shell, it is by no means a dispensable accessory!  Relevant domestic research has long found that electroslag resmelting furnaces cannot be used to refine easily oxidized metals such as copper, aluminum, and aluminum because they are located in an outdoor atmospheric environment.  In addition, the production environment of electroslag resmelting furnaces is very dusty and produces a large amount of fluorine gas, which causes serious environmental pollution and poses great harm to the health of operators.  After the military division carries out vacuum transformation, all kinds of dust and fluorine gas will be isolated and removed, which will play a great role in the health of technicians and environmental protection.  Of course, considering the increased cost, it still needs to be discussed whether it is worth it for China, which currently does not pay much attention to the environment.  Another benefit of the vacuum protective cover is that it removes oxygen and other gases in the furnace, making the texture of the steel ingot purer. Metals such as chromium, aluminum, and aluminum that could not be refined before can also be refined in this way.  Although there is no accurate data for the refined special aluminum alloy, laboratory research has found that its physical properties will be greatly improved, allowing domestic production of better quality aviation aluminum alloys.  Experts started a heated discussion on whether it is necessary to carry out vacuum transformation of domestic electroslag resmelting furnaces in order to increase investment by two or three times.
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